
Netrins have been identified as midline-derived chemoattractants that guide axons to the midline during development. Netrins are antagonized by Slit and Robo proteins which compete for DCC (deleted in colorectal cancer) receptor binding. Netrins also have axon repulsion effects when interacting with the UNC5 (uncoordinated-5) receptor family, either alone or with DCC receptors. Netrins are a laminin-related family of matrix-binding secreted proteins containing an N-terminal laminin gamma-chain-related globular domain (domain VI), three laminin EGF-like repeats, and a C-terminal heparin-binding domain.
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